I observed the following categories of motivation when analyzing intellectuals:
The 3 new instinctual variants: Pragmatist (P), Rationalist (R), and Metaphysicist (M).
The very vague and loose connections to the regular instincts: P=Sp, R=So, and M=Sx.
Pragmatists - Putting practices into action. (realistic like Sp)
Rationalists - Inventing reasonings for things. (explorative like So)
Metaphysicists - Envisioning beyond the mundane. (psychic like Sx)
My theories on which variants various forum members on my friends list may be (feel free to correct me):
Poimandres R/M, @Zang M/P, @superunknown R/P, @SolitaryWalker R/M, @Elfboy P/M, @The Great One P/R, @Speed Gavroche P/R, @Ene M/R, @greenfairy M/R, @Mal+ R/M, @Riva R/P